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Back firing

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Old 06-25-2011, 11:42 PM
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Year: 1990
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Engine: straight 6-cylinder
Default Back firing
I took my jeep out to some trails today, it ran great. On the way home it started to back fire and sputter please help idk what it is.
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Old 06-26-2011, 03:33 AM
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try go under your jeep and have a look at the upstream o2 sensors wirring, maybee the are broken due to you trail driving

good luck
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Old 06-26-2011, 07:23 AM
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Make?
Model?
Year?
Engine?
Mods to fuel/ign system?
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Mothers maiden name?
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Old 06-28-2011, 12:24 AM
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1990 cherokee 4.0
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